Key points
- Age alone does not prove failure, but older coverings may have less remaining service life.
- Missing or slipped tiles, failed flashings and defective gutters can create water-entry routes.
- Loft staining can be historic, intermittent or active and needs context.
- Structural alterations to rafters, purlins or chimney supports deserve particular attention.
What visible roof defects matter from outside?
The surveyor considers the overall covering and then the details where water is most likely to enter: ridges, hips, valleys, abutments, chimneys, parapets, rooflights and service penetrations.
Defects such as slipped tiles, open joints, deteriorated mortar, damaged flashings or heavy moss are interpreted in context rather than treated as identical risks.
- slipped, cracked or missing tiles or slates;
- open or poorly detailed flashings;
- defective ridge or hip bedding and pointing;
- sagging, leaking or blocked gutters;
- deteriorated chimney masonry, pots or flaunching;
- flat-roof seams, upstands or edges showing deterioration.
What can the loft tell you?
Where the loft is safely accessible, the underside of the roof can show staining, condensation, daylight, previous patch repairs, insect attack, timber alterations and the condition of insulation and ventilation.
A dry loft on the day of inspection does not prove that the roof has never leaked. Historic staining, weather conditions and the location of defects all need interpretation.
When is further investigation proportionate?
A Home Survey may be enough where defects are straightforward and visible. A focused roof inspection, contractor quotation or opening-up may be justified where access is restricted, the roof is unusually complex, previous repairs have failed or there is evidence of concealed deterioration.
Roof inspections are weather- and access-dependent. High-level areas may require binoculars, pole cameras, drone inspection or safe specialist access depending on the property and agreed scope.
Relevant SurveyAll service
Specific Defect Survey - Roof Problems
Where the roof is the defined concern, SurveyAll can carry out a focused inspection and report on visible defects, likely mechanisms and proportionate next steps.
Common questions
Questions people often ask
Does an old roof automatically need replacement?
No. Age influences remaining service life, but condition, covering type, previous repairs and current defects are more important than age alone.
Can a surveyor inspect every roof tile?
No. Roof inspection is normally visual from accessible vantage points and may use binoculars, cameras or drone imagery where appropriate. Hidden laps and concealed components cannot all be seen.
What if the loft is not accessible?
The report should record the limitation and explain whether the roof condition, property type or visible evidence makes further access or specialist investigation proportionate.
Sources and review
Recognised sources used for this guidance
These sources support the general guidance above. They do not replace property-specific inspection, current legal advice or specialist testing where those are needed.